Edigles Guedes, Raja Rama Gandhi, On the Complete Elliptic Integrals and Babylonian Identity V: The Complete Elliptic Integral of First Kind and Approximation by Inverse Sine Function, BMSA Volume 6, Bulletin of Mathematical Sciences and Applications (Volume 6)
https://www.scipress.com/BMSA.6.64
Abstract:
    I approximate the complete elliptic integral of first kind using inverse sine function.
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